notify_n "[WARN] ${warn_br_endpoint}" 3
fi
fi
+ # https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1797332
+ if lsb_release -d | grep -q -e 'Ubuntu 16.04'; then
+ if uname -r | grep -q -e '^4\.4\.'; then
+ notify_n "[WARN] Host kernel too old; nested virtualization issues!" 3
+ notify_n "[WARN] apt install linux-generic-hwe-16.04 && reboot" 3
+ notify_e "[ERROR] Please upgrade the kernel and reboot!"
+ fi
+ fi
fi
}